chore(deps): update dependency tsdown to v0.21.5 (main) (renovatebot#42306)

chore(deps): update dependency tsdown to v0.21.5

| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| npm        | tsdown  | 0.21.4 | 0.21.5 |

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -354,7 +354,7 @@
     "semantic-release": "25.0.3",
     "tar": "7.5.13",
     "tmp-promise": "3.0.3",
-    "tsdown": "0.21.4",
+    "tsdown": "0.21.5",
     "type-fest": "5.5.0",
     "typescript": "5.9.3",
     "typescript-eslint": "8.57.2",